title: Dimethyl 1,8-bis-(4-methyl-phen-yl)-11-oxatri-cyclo-[6.2.1.0(2,7)]undeca-2,4,6,9-tetra-ene-9,10-di-carboxyl-ate.
abstract: The title compound, C28H24O5, consists of a fused tricyclic system containing two five-membered rings and one six-membered ring. The five-membered rings both exhibit an envelope conformation with the O atom at the flap, whereas the six-membered ring adopts a boat conformation. The dihedral angle between the 4-methyl-phenyl rings at the 1,8-positions is 76.4 (1)°. In the crystal, mol-ecules are stacked in columns along the a axis through C-H⋯O inter-actions.
authors.affiliation: Department of Physics, P.T. Lee Chengalvaraya Naicker College of Engineering and Technology, Kancheepuram 631 502, India.
authors.forename: B
authors.initials: B
authors.lastname: Balakrishnan
authors.forename: Meganathan
authors.initials: M
authors.lastname: Nandakumar
authors.forename: P R
authors.initials: PR
authors.lastname: Seshadri
authors.forename: Arasambattu K
authors.initials: AK
authors.lastname: Mohanakrishnan